Paper-bag machinery



5 SheetsSheet '1. 7

(No Model.)

' G. B. STILWELL.

, PAPER BAG MACHINERY.

Patented Ma'y 3, 1892.

mentor: F724. 1% FM UTIi'nQSGBS 5 Sheets--Sheet 2.

G. B'. STILWELL. PAPER BYAG MACHINERY.

(No Model.)

Paltented May 3, 1892.

:{nvenfqr'z An a. 9% 4 Niimasses:

(No Model.)

5 Sheets-Sheet 3. G. B. STILWELL.

PAPER BAG MAGHINERY.

No. 473,977. Patented May a; 1892.

'6 Yaw? elm/6W 5 Sheets-Sheet 4.

(No Model.)

. G. B. STILWELL'.

PAPER BAG MACHINERY.

No. 473,977. Patented May 3, 1892..

(No Model.) 5 Sheets-Sheet 5. 0. B. STILWBLL.

PAPER BAG MACHINERY. No. 473,977. Patented May 3,1892.

UNITED STATES PATENT OFFICE.

CHARLES B. STILWVELL, OF WVAYNE, ASSIGNOR TO THE UNION PAPER BAG MACHINECOMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER-BAG MACHINERY.

SPECIFICATION forming part of Letters Patent No. 473,977, dated May 3,1892. Application filed September 18, 1891. Serial No. 06,080. (Nomodel.)

To all whom it may concern:

Be it known that I, CHARLES B. STILWELL, of WVayne, county of Delaware,State of Pennsylvania, have invented a certain new and usefulImprovement in Paper-Bag Machinery, of which the followingis a true andexact description, reference being had to the accompanying drawings,which form a part of this specification.

My invention relates to the construction of machinery for making paperbags, and particularly to the devices for cutting a continuous tube intobag-lengths, and for forming the tuck or fold at the bottom of thebag-blank to close it and form a bag.

My improvements will be best understood as described in connection withthe drawings, in which they are illustrated as embodied in a paper-bagmachine, and in which Figure 1 is aside elevation of the machine withthe driving-pulley on the end of the main shaft removed. Figs. 2 and 2constitute together a plan View of the machine; Fig. 3, a side elevationon the section-line w a: of Fig. 2. Fig. 4 is an elevation showing thepasteblade and the mechanism for actuating it. Fig. 5 is a similarelevation showing a tuckerblade and its actuating mechanism. Figs. 6 and7 are diagrams illustrating the 1neehanism for severing the tube intobag-lengths and its mode of operation. Fig. Sis a side elevation, on anenlarged scale, showing the manner and means by which the bottom fold isformed and pasted. Fig. 9 is a perspective view of the bag-blank; Fig.10, a similar view showing the bottom fold in the course of forming, andFig. 11 a similar View showing the bottom fold closed on the bagcompleted.

A is the frame of the machine, and B the driving-shaft, B and B being,respectively, fast and loose pulleys upon said shaft.

0 is the former about which the continuous paper tube is formed. Themechanism for forming the tube is not, however, illustrated.

F and F are feed-rolls cut away to permit the passage of a neck 0' ofthe former, which I broadens out, as shown at 0 on the delivery side ofthe feed-rolls and is provided with a knife-edge D at its extreme end.

D is also aknife-edge permanently secured slightly above and behind theknife-edge D.

by means of their respective gear-wheels f'and f, so that they willrotate with the same speed. The wheel f is engaged and driven by thegear f journaledon the stud f and driven in turn by the gear f securedto shaft B.

G is a segmental roller secured on shaft B, the active segment of whichis indicated by theletter 9 Above and somewhat backward or to thedelivery side of shaft B is the shaft G to which is secured thesegmental roller G, the active segment of which is indicated by Theshaft G is made adjustable in oblique guides H, h indicating theadjustingscrews by which the bearings of shaft G are adjusted in theguides, so that the segment 9 shall, in the rotation of the shafts G and13, come in contact and operate with the segment g as shown in diagram,Fig. 7. The shaft G is driven through the pinion g, which is engaged bythe pinion g on shaft B, and this gearing, together with the diameter ofthe rolls G and G, is such that their active se ments move with aperipheral velocity slightly less than that of the feed-rolls RF. Theinactive portions of the rolls G andG are of such diameter and so placedthat the paper will pass freely between the rolls without deflectionuntil the active segments come into operation. On coming into operationthe action of the rolls G and G upon the paper is to retard itsadvances, since they are moving with less velocity than the feed-rolls FF, and the effect of their oblique arrangement is to cause the paper tobulge upward, as shown in diagram, Fig. '7. This upward bulge is made totake place immediately before the striker D comes in contact with thetube and greatly facilitates the action of the striker in severing theblank against the knife-edges D and D. The arrangement of theseobliquely-set rolls G and G, in combination with the striker,knife-edges, and feed-rolls F and F, as described, constitutes onefeature of my improvement.

J is a roller secured to shaft J and driven by means of the gear-wheelj, which is in engagement with the gear j on shaft J The shaft J isdriven by means of its gear-wheel which is engaged by the gearj on shaftB.

I is aloosely-journaled roller situated above and operating byfrictional contact with the roller J.

K is a guide arranged to deflect the end of the blank downward after ithas passed between the rollers I and J. Below the guide K is situated abar L, and slightly in front of bar L is another bar M, a transverseopening or slot being formed between the two bars, as shown, thisopening being substantially in line with the rearmost edge of the rollerJ.

J is a roller secured to shaft J its operative face being supplementalin character, so that it only acts at intervals, in combination with theroller J and with the roller N. This last-mentioned roller is situatedbelow it and secured to a shaft N, which shaft is driven from shaft J Ois a guide by which the blanks are directed into the bight of therollers J and N.

The construction and mode of operation of the parts described are wellunderstood and form no part of my present invention, and I willtherefore not describe them in detail, saying, merely, that they act asfeed-rolls to deliver the completed blank and compact the seam at itsbottom.

Referring now to the mechanism for formin g and pasting the bottom seam,R is atuckerblade secured on the end of alever R, which lever is securedto the shaft Q, to which also is secured a lever R the two levers andthe shaft constituting in effect a bell-crank lever. By means of aconnecting-rod R the lever B is operatively connected with apivotedoscillating link R of which R is the pivot, and which link is given anoscillatory movement upon its pivot by means of the crank-pin R whichenters the slide R said slide moving in a slot R of link R. Thecrank-pin R as shown, is attached to a disk R on the end of shaft J butit will of course be understood that the desired oscillating movementcan be given to the link by'means of an eccentric, which is awell-recognized equivalent for the crank-pin in such constructions. Theaction of the shaft J in causing the upward and downward movement of thetucker-blade B through the devices described will be readily understood,and it will be seen that by means of this device for communicatingmotion I am enabled to secure a very rapid movement of the tucker-bladeduring the period in which it is acting upon the paper, while itsmotions when not in active operation are slow and gradual, and thisdevice constitutes another important feature of my present invention.The timing of the machine is such that the edge of the paper blank,marked T, (see Figs. 9, 10, and 11,-) passes over the opening be tweenthe bars L and M, while the tucker is above that opening. The tuckerthen moving rapidly downward engages the blank on the line T and pressesits end down between the bars L and M, forming the fold indicated atT inFig. 10.

Considering next the mechanism for applying paste to that portion of thebag lying beyond the line T, I will state that P indicates apaste-trough, at the end of which is situated the paste-roller P. Abovethe roller P is situated the roller P which acts to smooth and evenlydistribute paste on the roller P. The roller P and through it the rollerP, is actuated by means of a ratchet P and a pawl P attached to the endof a lever P pivoted at P and the end P of which is acted upon by a camP on shaft Q.

S is the paster-blade pivotally connected to the end of a lever S, whichlever is secured on a sleeve Q, situated on shaft Q, and from whichextends the lever-arm S The parts S, Q, and S constitute, substantially,a bellcrank lever. The lever thus formed is pivotally connected to anarm S extending out from an eccentric-ring S, secured on an eccentric Swhich in turn is attached to the shaft J Of course a crank can be usedin place of the eccentric, if it is desired. The operation of therotating shaft J 3 in giving an up-and-down motion to the paster-bladethrough the mechanism described is obvious. The motion is such that thepaster comes to the position'shown in Fig. 3 at the time when thetucker-blade comes in action on the blank. The bottom fold formed by thetucker is thrown up against the side of the pasterblade, receiving itspaste from it, and is then carried downward by the rapidlymoving tuckerto form the pasted fold. The pivoted paste-blade is also acted upon bythe device, consisting of the rod S which is rigidlyattached to thepaste-blad e, and the lever S which is pivotally attached to the top ofrod S and permanently pivoted at its other end at a point indicated ats. The action of these rods in connection with the lever-arm S is toalternately bring the paste-blade against the paste-roller P, as shownin dotted lines in Fig. 1 and in full lines in Fig. 4:, and then tobring it down to the position it occupies when operating on the blank,as shown in full lines in Fig. 1.

:Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a paper-bag machine, the combination, with feed-rolls F F, of aknife edge or edges, and a striker coacting therewith to sever the tube,as described, and situated on the delivery side of said rolls, and apair of intermittently-acting rolls G G, set with their axes in a planeextending obliquely backward to the plane of the former and geared torotate at less surface speed than rolls F F, all substantially as andfor the purpose specified.

2. In a paper-bag machine, the combination IIO of a tucker R, asupporting bell-crank lever, as R, Q, and R a pivoted slotted link R, arotating pin R Working on the slot of link R and arranged to give anoscillating movement of varying speed to the link R, and aconnecting-bar R arranged between the link and bell-crank lever,substantially as and for the purpose specified.

3. In a paper-bag machine, the combination of the concentrically-pivotedbell-crank levers R Q R and S Q S, a shaft J ,a pivoted link R and acrank-pin or its equivalent R secured to shaft J 3 and connected to thelink R so as to give it an oscillatory movement,

lVitnesses:

LEWIS R. DICK, JOSHUA MATLAOK, Jr.

